From Cotton + Steel:
Cotton+Steel Thread by Sulky is a 50 wt. cotton thread made from 100% Egyptian grown cotton, spun in Egypt and dyed in Italy. We worked closely with Sulky to develop this thread from the ground up, creating a high-quality thread in 100 vibrant shades. It is glossy, luscious and perfect for everything from piecing to quilting to garment sewing, and the cheeky mix and match labels and colorful spools are a major dose of eye candy for your sewing room.
See the Sulky website and the C+S blog for more info, and the #cottonandsteelthread Instagram hashtag for lots more photos. Also, there's a beautiful video on how the thread is produced!